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Division Spotlight
Human Factors, Instrumentation & Controls
Improving task performance, system reliability, system and personnel safety, efficiency, and effectiveness are the division's main objectives. Its major areas of interest include task design, procedures, training, instrument and control layout and placement, stress control, anthropometrics, psychological input, and motivation.
Meeting Spotlight
International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2025)
April 27–30, 2025
Denver, CO|The Westin Denver Downtown
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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Latest News
TerraPower begins U.K. regulatory approval process
Seattle-based TerraPower signaled its interest this week in building its Natrium small modular reactor in the United Kingdom, the company announced.
TerraPower sent a letter to the U.K.’s Department for Energy Security and Net Zero, formally establishing its intention to enter the U.K. generic design assessment (GDA) process. This is TerraPower’s first step in deployment of its Natrium technology—a 345-MW sodium fast reactor coupled with a molten salt energy storage unit—on the international stage.
J. Jedruch, R. J. Nodvik
Nuclear Technology | Volume 3 | Number 8 | August 1967 | Pages 507-518
Technical Paper and Note | doi.org/10.13182/NT67-A27783
Articles are hosted by Taylor and Francis Online.
The determination of the isotopic composition and the fission-product inventories of a spent reactor core is demonstrated through the proper selection of sampling points and analytical treatment of data using Core I of the Yankee reactor as an example. This core is found to contain 172 kg of 235U less than initially loaded, plus 97.0 kg of freshly generated Pu. Mass balances of U and Pu isotopes and the fission products are used to demonstrate the various possible ways of defining the end-of-life conversion ratio, with the preferred definition giving a value of 0.50 for the Yankee core. Methods of determining the total burnup from U and Pu concentrations, from 137Cs activity, and from plant calorimetrics are discussed and applied to the Yankee data and give 8.40 ± 0.21 GWD/MTU for the core average burnup.
